For the RAWS agent upgrades, once you are sure that the media server has SP1a and any subsequent patches installed, push-install them to your remote servers. Chances are good you won't need server restarts, but if AOFO is installed, the server will require a restart.

You need download the BE 2012 installation DVD. before you can upgrade. You cannot upgrade using LiveUpdate. You can download BE 2012 from www.backupexec.com. Click on BE in the trialware section.

After you push out the BE 2012 remote agents, you definitely need to re-boot the remote server. If you don't have time to re-boot them all at the same time, you can do them one-by-one. BE 2012 can work with BE 2010 remote agents, but you would not get the benefits of the improvements in BE 2012.

...which is why both pkh and myself advised you that BE 2012 is completely different. It is no longer resource-centric (meaning you can lump as many servers as you want into 1 job), but now server-centric, meaning each server now has its own job!

No. You would have to add amount saved in each job manually. You might want to see whether you can do a customised report to get this number for you or use a BEMCLI script and add up this number from the job history.